1384939261 has 2 divisors, whose sum is σ = 1384939262. Its totient is φ = 1384939260.

The previous prime is 1384939247. The next prime is 1384939301. The reversal of 1384939261 is 1629394831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1225700100 + 159239161 = 35010^2 + 12619^2 .

It is an emirp because it is prime and its reverse (1629394831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1384939261 - 2²⁷ = 1250721533 is a prime.

It is a super-2 number, since 2×1384939261² = 3836113513318452242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1384934261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692469630 + 692469631.

It is an arithmetic number, because the mean of its divisors is an integer number (692469631).

Almost surely, 2^1384939261 is an apocalyptic number.

It is an amenable number.

1384939261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1384939261 is an equidigital number, since it uses as much as digits as its factorization.

1384939261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 1384939261 is about 37214.7720804521. The cubic root of 1384939261 is about 1114.6629749492.

The spelling of 1384939261 in words is "one billion, three hundred eighty-four million, nine hundred thirty-nine thousand, two hundred sixty-one".